/**
* @author AlbertDarren
* @contact 2563491540@qq.com
*/
#include <iostream>

using namespace std;

int main_21()
{
    int year;
    scanf("%d",&year);
    if ((year%4==0&&year%100!=0)||year%400==0)
    {
        printf("yes\n");
    }
    else
    {
        printf("no\n");
    }
	return 0;
}
